Laying out a wall plate for studs at 16 on center.

To ensure 4×8 ft (48″) sheathing breaks on a stud when using 16″ on-center (OC) stud spacing:

1. Mark the first stud at 12″ from the corner (or starting edge). - This aligns the 48″ sheathing panel edge with a stud at 12″ + 48″ = 60″, which is a stud location (60″ ÷ 16″ = 3.75 bays → 4th stud at 64″ OC, but 60″ is a stud since 16×3.75=60). - Wait—correct calculation: Studs at 16″ OC means studs at 0″, 16″, 32″, 48″, 64″, etc. To make a 48″ panel end on a stud, start the first stud at 12″ so the panel spans 12″–60″ (48″), ending at 60″ (a stud location: 16×3.75=60).

1. Mark every 16″ OC from there: 12″, 28″, 44″, 60″, 76″, etc.

This ensures each 48″ panel starts and ends on a stud. If starting at 0″, the first panel (0″–48″) ends on a stud, but subsequent panels (48″–96″) also align. However, starting at 12″ accounts for typical corner conditions and avoids awkward cuts at the edge.

Code note: IRC R602.3 requires studs at 16″ OC for exterior walls (for seismic/wind loads). Always verify local codes.

Practical tip: Use a layout ruler or chalk line to mark 12″, then 16″ increments. Double-check before cutting sheathing.

Mark at 15¼″ from the end of the plate.

Why: A 48″ sheet must land its center on a stud. With 16″ OC layout, the stud centers fall at multiples of 16″ (16, 32, 48…). The first stud center must therefore be 16″ from the outside edge of the wall. Since a standard stud is 1½″ thick, its leading edge is 16″ − ¾″ = 15¼″ from the plate end.

Procedure

1. Hook tape on the plate end (outside corner).
2. Mark 15¼″ → “X” for first stud leading edge.
3. From that mark, pull tape and mark every 16″ (31¼″, 47¼″, 63¼″…).
4. “X” on the same side of each line.

Check: At 47¼″ the stud center is 48″—dead center of the first sheet. Next break at 96″ (47¼″ + 48¾″ = 96″ center).

Code/Reference: IRC R602.3(1) & standard framing practice.